2004 SUBARU FORESTER engine

4AT-84
AUTOMATIC TRANSMISSION
ATF Cooler (With Warmer Function)
25.ATF Cooler (With Warmer
Function)
A: REMOVAL
1) Drain engine coolant. REPLACEMENT, Engine Coolant.>
2) Remove the air cleaner case. 6, REMOVAL, Air Cleaner Case.>
3) Remove the harness from bracket.
4) Disconnect the hose from pipe of transmission.
5) Disconnect the engine coolant inlet hose from
cylinder block and the engine coolant outlet hose
from upper side of engine.6) Remove the ATF Cooler (with warmer function)
from transmission body, and then disconnect the
hose located lower of ATF cooler (with warmer
function).
(A) Inlet pipe
(B) Outlet pipe
(A) Outlet hose
(B) Inlet hose
AT-01867
AT-01866(A)(B)
AT-02113
(A)
(B)
AT-01868

4AT-85
AUTOMATIC TRANSMISSION
ATF Cooler (With Warmer Function)
B: INSTALLATION
1) Connect the hose to lower side of ATF cooler
(with warmer function), and then install the ATF
cooler (with warmer function) to transmission body.
NOTE:
Insert the tip of ATF cooler bracket into hole of
torque converter case.
Tightening torque:
T1: 21 N
⋅m (2.1 kgf-m, 15.5 ft-lb)
T2: 23 N
⋅m (2.3 kgf-m, 17.0 ft-lb)
T3: 33 N
⋅m (3.4 kgf-m, 24.3 ft-lb)
2) Connect the engine coolant inlet hose to cylinder
block and the engine coolant outlet hose to upper
side of engine.3) Connect the hose to pipe on transmission side.
4) Install the harness to bracket.
5) Install the air cleaner case. REMOVAL, Air Cleaner Case.>
6) Fill with engine coolant. REPLACEMENT, Engine Coolant.>
(A) Outlet hose
(B) Inlet hose
AT-01869
T2
T1T3
AT-02113
(A)
(B)
(A) Inlet pipe
(B) Outlet pipe
AT-01866(A)(B)
AT-01867

4AT-86
AUTOMATIC TRANSMISSION
ATF Cooler (With Warmer Function)
C: DISASSEMBLY
1) Disconnect each connector from ATF cooler
(with warmer function).
2) Remove the ATF cooler (with warmer function)
from bracket.
D: ASSEMBLY
Assemble in the reverse order of disassembly.
CAUTION:
When connecting hose, be careful of its direc-
tion.
Tightening torque:
T1: 23 N
⋅m (2.3 kgf-m, 17.0 ft-lb)T2: 33 N
⋅m (3.4 kgf-m, 24.3 ft-lb)
E: INSPECTION
Check the ATF cooler (with warmer function) for
damage.
(A) ATF Outlet hose
(B) ATF Inlet hose
(C) Engine coolant inlet hose
(D) Engine coolant outlet hose
AT-02114
(A) (B)(C)
(D)
AT-02115
(A) ATF Inlet hose
(B) ATF Outlet hose
(C) Engine coolant outlet hose
(D) Engine coolant inlet hose
(A) ATF Inlet
(B) ATF Outlet
(C) Engine coolant outlet
(D) Engine coolant inlet
(E) Forward
AT-02116
T1
T2
(B)
(D) (C)
(A)
AT-02117
(D)(B)(A)
(C)
(E)

4AT(H4SO)-6
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
General Description
5. OPERATION OF SHIFT SELECT LEVER
Make sure there is no abnormal noise, dragging or
contact pattern in each select lever range.
WARNING:
Stop the engine while checking operation of se-
lect lever.
6. POWER SWITCH
Make sure that the POWER indicator light in com-
bination meter comes ON, when turning the POW-
ER switch to ON.
7. HOLD SWITCH
Make sure that the HOLD indicator light in combi-
nation meter comes ON, when turning the HOLD
switch to ON.
AT-00413
P
R
N
D
3
2
1
AT-00319
AT-00320

4AT(H4SO)-8
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Electrical Components Location
4. Electrical Components Location
A: LOCATION
1. CONTROL MODULE
 LHD MODEL
 RHD MODEL
(1) Engine control module (ECM) (3) Transmission control module
(TCM)(4) Data link connector
(2) AT warning light (POWER indica-
tor light)
AT-00414
(1) (2)
(3) (4)
AT-00369 (2)
(4)
(1)
(3)

4AT(H4SO)-12
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
5. Transmission Control Module (TCM) I/O Signal
A: ELECTRICAL SPECIFICATION
Check with ignition switch ON.
ContentConnector
No.Terminal No. Measuring conditions Voltage (V)Resistance
to chassis
ground (Ω)
Back-up power supply B56 1 Ignition switch OFF 10 — 13 —
Ignition power supplyB54 23
Ignition switch ON (with
engine OFF)10 — 13 —
B54 24
Inhibitor
switch“P” range
switchB55 1Select lever in “P” range Less than 1
—
Select lever in any other than
“P” range (except “N” range)More than 8
“N” range
switchB55 14Select lever in “N” range Less than 1
—
Select lever in any other than
“N” range (except “P” range)More than 8
“R” range
switchB55 3Select lever in “R” range Less than 1
—
Select lever in any other
than “R” rangeMore than 8
“D” range
switchB55 4Select lever in “D” range Less than 1
—
Select lever in any other
than “D” rangeMore than 8
“3” range
switchB55 5Select lever in “3” range Less than 1
—
Select lever in any other
than “3” rangeMore than 8
AT-00568
toB54
1 2
7 8 9563 4
10 11 12
19 20 21 13 14 15 16 17 18
22
23
24
toB55
1 2 3 4
10 11 12
19 20 21 13
5 6
14 15
7 8 9
16 17 18
22 23 24
toB56
1 2
7 8 95 63 4
10 11 12
19 20 21 13 14 15
16 17 18
22
23
24

4AT(H4SO)-13
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
Inhibitor
switch“2” range
switchB55 6Select lever in “2” range Less than 1
—
Select lever in any other
than “2” rangeMore than 8
“1” range
switchB55 7Select lever in “1” range Less than 1
—
Select lever in any other
than “1” rangeMore than 8
Brake switch B55 12Brake pedal depressed More than 10.5
—
Brake pedal released Less than 1
Kick-down switch B55 11Throttle fully opened Less than 1
—
Throttle fully closed More than 6.5
AT OIL TEMP warning light B56 10Light ON Less than 1
—
Light OFF More than 9
Throttle position sensor B54 3Throttle fully closed 0.2 — 1.0
—
Throttle fully open 4.2 — 4.7
Throttle position sensor
power supplyB54 2Ignition switch ON (with
engine OFF)4.8 — 5.3 —
ATF temperature sensor B54 11ATF temperature 20°C
(68°F)1.6 — 2.0 2.1 k — 2.9 k
ATF temperature 80°C
(176°F)0.4 — 0.9 275 — 375
Rear vehicle speed sensor B55 24Vehicle stopped 0
450 — 650
Vehicle speed at least 20
km/h (12 MPH)More than 1 (AC range)
Front vehicle speed sensor B55 18Vehicle stopped 0
450 — 650
Vehicle speed at least 20
km/h (12 MPH)More than 1 (AC range)
Torque converter turbine
speed sensorB55 8Engine idling after warm-
up (D range)0
450 — 650
Engine idling after warm-
up (N range)More than 1 (AC range)
Vehicle speed output signal B56 17Vehicle speed at most 10
km/h (6 MPH)Less than 1 ←
→ More than 4—
Engine speed signal B55 17Ignition switch ON (with
engine OFF)More than 10.5
—
Ignition switch ON (with
engine ON)8 — 11
Cruise set signal B55 22When cruise control is set
(SET lamp ON)Less than 1
—
When cruise control is not
set (SET lamp OFF)More than 6.5
Torque control signal 1 B56 5Ignition switch ON (with
engine ON)More than 4 —
Torque control signal 2 B56 14Ignition switch ON (with
engine ON)More than 4 —
Torque control cut signal B55 10Ignition switch ON
(After engine is warmed-up)8—
Intake manifold pressure
signalB54 1 Engine idling after warm-up 0.4 — 1.6 —
Shift solenoid 1 B54 221st or 4th gear More than 9
10 — 16
2nd or 3rd gear Less than 1
Shift solenoid 2 B54 51st or 2nd gear More than 9
10 — 16
3rd or 4th gear Less than 1 Check with ignition switch ON.
ContentConnector
No.Terminal No. Measuring conditions Voltage (V)Resistance
to chassis
ground (Ω)

4AT(H4SO)-14
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
Line pressure duty solenoid B54 9Ignition switch ON (with
engine OFF)
Throttle fully closed after
war m-up1.5 — 4.0
2.0 — 4.5
Ignition switch ON (with
engine OFF)
Throttle fully open after
war m-upLess than 0.5
Lock-up duty solenoid B54 7When lock up occurs More than 8.5
10 — 17
When lock up is released Less than 0.5
Transfer duty solenoid B54 6Fuse on FWD switch Less than 0.5
10 — 17 Fuse removed from FWD
switch (with throttle fully
open and with select lever
in 1st gear)More than 8.5
2-4 brake duty solenoid B54 18Throttle fully closed (with
engine OFF) after warm-up1.5 — 5.0
2.0 — 4.5
Throttle fully open (with
engine OFF) after warm-upLess than 0.5
2-4 brake timing solenoid B54 161st gear Less than 1
10 — 16
3rd gear More than 9
Low clutch timing solenoid B54 152nd gear Less than 1
10 — 16
4th gear More than 9
HOLD switch B55 16HOLD switch ON Less than 1 —
HOLD switch OFF More than 8 —
POWER switch B55 23POWER switch ON Less than 1 —
POWER switch OFF More than 10 —
POWER indicator light B56 11Light ON Less than 1 —
Light OFF More than 9 —
FWD switch B55 20Fuse removed 6 — 9.1 —
Fuse installed Less than 1 —
FWD indicator light B56 2Fused on FWD switch Less than 1 —
Fuse removed from FWD
switchMore than 9 —
ABS signal B55 21ABS switch ON Less than 1 —
ABS switch OFF 6.5 — 15 —
Sensor ground line 1 B54 20 — 0 Less than 1
Sensor ground line 2 B55 9 — 0 Less than 1
System ground lineB56 19
— 0 Less than 1
B54 21
Sensor ground line 3 B54 10 — 0 Less than 1
Sensor ground line 4 B54 19 — 0 Less than 1
AT diagnosis signal B56 21 Ignition switch ONLess than 1 ←
→ More than 4—
Data link signal (Subaru
Select Monitor)B56 15 — — —Check with ignition switch ON.
ContentConnector
No.Terminal No. Measuring conditions Voltage (V)Resistance
to chassis
ground (Ω)